CDC Cancels Planned Summit On Climate Change And Health

FILE - In this Oct. 8, 2013, file photo, a sign marks the entrance to the federal Centers for Disease Control and Prevention in Atlanta. Officials on Friday, Aug. 15, 2014, released the results of an internal probe into a deadly strain of bird flu that was accidentally mixed with a tamer strain. Unsuspecting scientists worked with the viral mix for months before it was discovered. (AP Photo/David Goldman, File)